Fused Ring Indeno Compounds For Preparation Of Photochromic Compounds

An intermediate compound for preparation of a photochromic compound, wherein said intermediate compound is represented by the following Formula (I-A),

• wherein,
• Ring-A is selected from aryl and fused ring aryl,
• n is selected from 1 to 8,
• R1 for each n is in each case independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl each optionally and independently interrupted with at least one of —O—, —S—, —C(O)—, —C(O)O—, —S(O)—, —SO2—, —N═N—, —N(R11′)— where R11′ is selected from hydrogen, hydrocarbyl or substituted hydrocarbyl, —Si(OR8′)w(R8′)t—, where w and t are each independently selected from 0 to 2, provided that the sum of w and t is 2, and each R8′ is independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl, and combinations of two or more thereof;
• halogen;
• cyano;
• —O—R10′ or —S—R10′ or —C(O)—R10′ or —C(O)—OR10′, wherein each R10′ is independently selected from hydrogen, hydrocarbyl or substituted hydrocarbyl;
• perhalohydrocarbyl;
• and —C(O)—N(R11′)(R12′) or —N(R11′)R12′, wherein R11′ and R12′ are each independently selected from hydrogen, hydrocarbyl or substituted hydrocarbyl, or R11′ and R12′ together form a ring structure optionally including at least one heteroatom,
• R2 and R3 are each independently selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, halogen, —C(O)—N(R14)(R15), —N(R14)(R15), —SR16, and —OR16, where R14 and R15 are each independently selected from hydrogen, hydrocarbyl, and substituted hydrocarbyl, or R14 and R15 together form a ring, and each R16 is independently selected from hydrocarbyl and substituted hydrocarbyl,
• R4 and R5 are each independently selected from hydrogen, hydrocarbyl, and substituted hydrocarbyl, each optionally and independently interrupted with —O—, —S—, —N(R11′)—, where R11′ is selected from hydrogen, hydrocarbyl or substituted hydrocarbyl,
• R6 is selected from hydrogen, —C(O)—R19 and —S(O)(O)R19, wherein R19 is selected from hydrocarbyl and halohydrocarbyl,
• Z1 and Z3 are each independently selected from O, C(O) and C(Ra)(Rb), where Ra and Rb are each independently selected from hydrogen, hydroxyl, and C1-C20 linear or branched alkyl, provided that at least one of Z1 and Z3 is C(O), and
• Z2 is selected from O, S, divalent hydrocarbyl, and N—R13, where R13 is selected from hydrogen, hydrocarbyl and substituted hydrocarbyl each optionally and independently interrupted with at least one of —O—, —S—, —C(O)—, —C(O)O—, —S(O)—, —SO2—, —N═N—, —N(R11′)— where R11′ is selected from hydrogen, hydrocarbyl or substituted hydrocarbyl, —Si(OR8′)w(R8′)t—, where w and t are each independently selected from 0 to 2, provided that the sum of w and t is 2, and each R8′ is independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl, and combinations of two or more thereof, or Z2 defines an optionally substituted fused ring.